Malice

Collect 10 crystal heart pots during game play to earn one extra
life. *** Each level has five crystals.
Final 4 crystal heart pots:
There are 4 crystal heart pots that are not found in the normal
game. To collect them, intentionally die and go through the Beach Of
Souls to the next Beach Of Souls with the lighthouse. Now, get
through the sequence of jumps sequence that are timed by the firefly
to get the last 4 crystal heart pots. *** Collecting these and
all the other 4 crystal heart pots in the normal game will give
you a total of 100 of them.